Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c8b04c98606a0b…

MALICIOUS

PDF

92.6 KB Created: 2021-03-16 01:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 33060d7addb3a8800def9a7f32e4cf93 SHA-1: 17902faf12df7f9c5f3a99583aa798d908cd2cf4 SHA-256: 11c8b04c98606a0bac39e0bd2b78442910e43bc76ce71237c58b215c2aa3d28f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/wix?keyword=rutgers+fall+2020+application+deadline PDF link annotation
    • https://cdn.sqhk.co/xopuxuvop/HgiZlpd/battle_angel_alita_mars_chronicle_volume_7.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/F2icidE/british_superbike_riders_names.pdfIn PDF document text
    • https://cdn.sqhk.co/kufezagivori/hc2JJhh/ants_go_marching_one_by_one_original.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/gPhgbhh/diamond_quest_don_t_rush_play_online.pdfIn PDF document text
    • http://bluebadgeapproval.com/detugurijtbc1.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/76830320275mqxtd.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/fRSihid/32404592615.pdfIn PDF document text
    • http://vidavubaxo.22web.org/2596095843.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/ieHiahe/42119227425.pdfIn PDF document text
    • http://moreprodukti.com/myanmar_3_font_for_mac53vat.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/idifgf9/vosojemelowisod.pdfIn PDF document text
    • http://tlgfree.xyz/603961039442ldam.pdfIn PDF document text
    • http://securespot.ru/46517077246e7hua.pdfIn PDF document text
    • http://midazimika.iblogger.org/30551299091.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/qk6jZje/28371025818.pdfIn PDF document text
    • https://cdn.sqhk.co/xumirikebixo/geihijc/fuvulapomotiwekakunoful.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xaxidos.epizy.com/avinew_neo.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/bomberman_rom_gba.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/denon_avr-x4200w_bluetooth_headphones.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/ac_market_apkpure_free.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/97953455486.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/assassin_s_creed_revelations_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/7798323291.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/my_favourite_dog_essay_in_hindi.pdfIn PDF document text
    • http://zakuzoresibib.epizy.com/multiple_intelligences_explains_that_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/berger_paints_annual_report_2017-_18.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC1 5488 bytes
SHA-256: c3773e60ea1b2a093d909514c631c4207a2d66140019db7f2653ccc6fc3110e6
font_01_sfnt_off00012e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E79 11264 bytes
SHA-256: 380281e25e76bd41ba2c564a7e63783ef03d25c892fe512cbbe3e96bfbca938b
font_02_sfnt_off000154f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154F7 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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